Wild buffalo reintroduced in Illinois

Anthony Souffle, Chicago Tribune

A bison peers through the tall grass at the Nachusa Grasslands prairie restoration site in December 2014 in Franklin Grove, Ill. Bill Kleiman, the project director, said the bison have done very well since their arrival in early October.

20 bison made an eight-hour truck trip to Nachusa Grasslands preserve in Illinois, from Broken Kettle Grasslands preserve near Sioux City, Iowa -- the key part of an ambitious prairie restoration 95 miles west of Chicago.